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C. C. SPREEN I v 192$ MECHANICAL REFRIGERATION 75 Original and July 27,1926 Z [raven for I 5 H c aarlos 'C. Spreen Reiaaed Dec. 10, 1929 v Re.17,518

SIRE, DETROIT, MICHIGAN, ASSIGNOB TO KELVINATOB CORPORA- 110K, 0]DETROIT, MICHIGAN, AUOBPOBATIOH OI IICEIGAN MECHANICAL REFRIGERATIONOriginal Io. 1.711352, am a ru so, me, Serial 110. 125,100, fled m av,1920. Application m- "a filed June 18, 1889.

My invention relates to mechanical reirigeration, and particularly tosectional expansion umts itrativeform of my invention,

Figure 2 is a section onthe line 2-2 of Figure 1, while v F igure 3 is asection on the hue 3-3'of he embodiment of my invention herein shown anddescribed comprises an intermediate section 11 flanked by two endsections 12, and each of these sections comprises an upper connectinortion 13 arranged to receive at 'eitheren either a nipple 14 connectingthat upper connecting portlon 13 with the upper connecting portion 13 ofan adjacent section, or a plug 15 closing that end of that upperconnecting portion 13, a lower connecting portion 16 arranged to receiveat either on either a nipple 17 connectin that lower connecting portion16 with the ower connecting portion 16 of an adjacent section, or a plug18 closing that end of that lower connecting portion 16, and a centralheat-trapsferring portion 19 extending beween and in "communication withthe upper and lower connecting portions 13 and 16 of that sectionandprovlded on either face with a plurality of fins 20 serving toincrease the transfer of heat into or from the heat transferrin portion19 and, in cooperation with the s 20 of an adjacent section, to providesuitable supports for receptacle 21 forthe formation of artificial ice.i I

Integral with the upper connecting portion 13 of the intermediate,section 11, and in communication therewith, is a chamber 22 arranged toreceive control valve means for regulating the flow of liquidrefrigerant this use. In the drag of the compressor-condenser-fl SerialIo. 870,888.

into the expansion unit, this chamber 22 comprising. a horizontalcylindrical body 23 integral with the upper connecting portion 13 of theintermediate section 11 closed at one end by an integral end wall 24,and closed at the other end by an end plate 25 secured in position inany suitable manner, suplporting on'its' exterior the outlet shut-ofi vave 26 and the'inlet shut-01f valve 27, and supporting on its interior ablock 28 conta ning an inlet duct- (not shown) communicating with theinlet valve 27 and arranged to be closed by means of a valve 29 operatedby a float 30 ivoted at 31 to a strut 32 extending outwar y from theblock 28.

From the above description it will be .ap-

parent to those skilled in the art that I have prov ded a new and imroved sectional expansion un t particular y adapted for usewithmefngeratmg apparatus of the compressor-condenser-floode -expandertype. At the same time, it will also be obvious to those skilled in theart that the particular embodiment of my invention herein shown anddescribed maybe variousl changed and modified without departing 'om'thespirit of my invention; or sacrificing the advantages there-- of,and-it-will accordingly be understood that the disclosure herein isillustrative only and that my invention isJnot limited thereto.

I claim: a i 1. In a mechanical refrigeratin mid-expander type, anexpansion unit ,compris n a lurahty of sections connected with t eirinteriors in operative communication, a chamber for the reception ofcontrol valve means integral with one of said sections with its interiorin operative communication withthe interior of said section, andcontrolvalve means operatively positioned within 'saidchamber.

2. In a mechanical-refrigerat' apparatus of thecompressor-condenser-floo ed-expander type, an expansion unit comprisinga pair of end refri rating sections and an inter-- mediate section allconnected with their interiors in operative communication, a chamber forthe reception of control valvemeans above and integral with saidintermediate secapparatus tion with its interior in operativecommunicaof the compressor-condenser-fl d-expander type, a sectionalexpansion unit comprising a section arranged to be connected with. itsinterior in operative communication'wlth the interiors of other sectionsand comprisin a chamber for the reception of control va ve meansintegral with said section with its interior in operative communicationwith the interior of said section.

4. In a mechanical refrigerating apparatus of thecompressor-condenser-flooded-expander type, a sectional expansion unitcomprising a section arranged to be connected with A its interior inoperative communication with the interiors of other sections andcomprising a chamber for the reception of control valve means above andintegral with" said section with its interior in operative communicationwith the interior of said section.

5. A refrigerating unit comprising hollow spaced apart side sections forcontaining the refri rating fluid, a tubular spacer interpose betweensaid sections at the bottom and communicating with the interior thereof,a vfloat valve chamber, a tubular boss depending therefrom correspondingin width to said spacer and interposed between said sections at the topand communicating with the interior 6. A refrigerating unit comprisinghollow spaced apart side sections for containing the refri crating fluidhaving corresponding tub ular osses at the top and bottom of theadjacent sides projecting in line each with the other and communicatingwith the interior of the respective sections, a float valve chamber, atubular boss depending therefrom of lesser ividth than said chamber andinterposed between and incommunication with the upper aligned sidebosses, a tubular spacer similar in width to the valve chamber bossinterposed between and in communication with the interior of the loweraligned side bosses, and a float and float-operated valve within saidvalve chamber for controlling the admission of the refrigerating fluid.

In testimony signature.

whereof I hereunto aflix my CHARLES C. SPREEN.

